Riving-machine



(No Model.)

I. A. DAVIS.

RIVING MAGHINE.

No. 339,866. Patented Apr. 13, 1886.

2 WITNESSES:

3 @1/ A f fiw J BY UNITED STATES PATENT OFFICE.

ISRAEL A. DAVIS, OF ENGLEV'OOD, CALIFORNIA.

RlVlNG-MACHINE.

SPBCIPICATXON forming part of Letters Patent No. 339,866, dated April 13, 1886.

To all whom it may concern.-

Be it known that ISRAEL A. DAVIS, of Englewood,'in the county of Humboldt and State of California, have invented a new and Improved Riving-Machine, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved machine for riving or splitting boards, shingles, lat-hs, pickets, 820.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and pointed out in the claims.

Reference is to be had to the accompanying 1 5 drawings, forming part of this specification, in

which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a plan view of my improved riving-machine. Fig. 2 is a longitudinal sectional elevation of the same on the line 00 a, Fig. 1. Fig. 3 is an enlarged detail end view of the feeding device.

The platform A is held by supports A above the base B, and on the samea head or block, slides, which will 'be described hereinafter. The block 0 is provided with an extension, 0, connected by a connecting rod, D, with a crank-pin on a wheel, E, on a shaft, F, carryinga belt-pulley, G, overwhich a belt, H, is passed, also passed over a pulley, I, on the shaft 1, with a cog-wheel. J, engaging with a cog-wheel, K, on a shaft, L, andjournaled in standards M.

Between the standards M a series of frows or wedges, N, are held upright at the end of the platform A, and through apertures in the upper ends of the frowsthe shaft L passes. A rod, 0, is passed through apertures in the lower ends of the frows. The upper ends of the frowsN are held in the forked front ends of thesprings P, held at theiqreir ends on rods Q, held by braces R,proj ecting from the standards M. The lower ends of the frows N are held in the forked ends of springs S,below the platform A.

Between each pair of frows N an arm, T, is mounted on the shaft L, to turn with said shaft; but at the same time they move between the ends of the springs P and the upper ends of the frowsN mounted to slide on said shaft.

The platform A has side pieces, a, and at the inner sides of the side pieces bars I) are pivoted on the platform A, at the middle of the length of said bars, in such a manner that the ends of the bars I) can swing toward and from the side pieces, a.

On the front end of the block 0 two jaws, d, are pivoted to swing laterally, and are rab-' beted, so as to overlap when swung together. They are pressed from each other by aspring, h, between them.

The operation is as fo'lows: A piece of wood is placed on the platform A. the block. 0 being at its greatest distance from the frows or wedges N. When the block 0 moves toward the frows, it forces the piece of wood through the spaces between the wedges or frows and splits the same into laths, shingles, pickets, boards, &c., ofequal width. \Vhile the wood is being forced through the spaces between the frows, it separates the frows equidistant. A greater or less number of frows are provided, according to the number of pieces to be obtained for each stroke of the block 0. While the block (J is being withdrawn the arms T on the shaft L are in such a position that they can strike the shingles, pickets, &c., and force them out of the spaces between the frows or wedges. Then another piece oftimber is split, the pieces forced out by arms T, and so on, so that the timber is forced straight and not to one side, and as it widens in being split the head (J must widen. This it does automatically as it approaches the frows, for the bars I), which have their outer edges beveled at the front part, are swung against the side pieces, a, and the spring h swings the jaws (I from each other. \Vhile the block is being withdrawn the jaws d are pressed together again.

In riving shingles, short shakes, or boards the machine may be shortened in proportion, and large cog-wheels may be used instead of belts and pulleys.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, in a riving -machine, with a plunger or head-block, of frows in advance of the same, and springs connecting the frows at their opposite sides to the machine, whereby a clear passage is afforded the material being operated upon between the frows, substantially as set forth.

2. The combination, with the frows of a riving-machine, of movable arms extending between the frows and constructed to remove the split material, substantially as set forth.

3. The combination of the platform, the plunger or head-block, and the expansible block on the end of the same, of'the frows in advance of said block, substantially as set forth.

4. A riving-mac-hinehavinga platform provided with side pieces forming guides and up right frows at one end of said platform, in combination with an expansible sliding block on the platform between the side pieces and in front of the frows, substantially as set forth.

5. In a riving machine, the combination, with a series of frows, of revolving arms between their upper ends, a sliding block for,

forcing the wood through the spaces between the frows, which block and the revolving arms are operated from the same shaft, substantially as herein shown and described.

6. In a riving-machine, the combination, with aseries of frows, ofa rotary shaft passed loosely through their upper ends, and of arms mounted on the shaft' between the frowsand constructed to remove the split material, substantially as herein shown and described,

7. In a riving machine, the combination, with the frows N, ofthe springs P and S, connecting the frows at their upper and lower ends to the machine, the rotary shaft L, journaled at the upper ends of the frows, and the arms T on the same and extending between the frows, substantially as herein shown and described. a

8. In a rivingmachine, thecombination,

with the frows N, of the platform A, in line V I with the frows, the sliding block 0 on the plat form, the pivoted jaws d on the same, and the spring h, for pressing the jaws from each other, substantially as herein shown and described.

9. In a rivingmachine, the combination,

with the frows N, of the platform A, in line with the frows, the bars b, pivoted on the same, the sliding block 0, the jaws d, pivoted.

on the same 011 opposite sides of the sliding blocks, and the spring h, for pressing thejaws, apart, substantially as herein shown and de scribed.

10. In a riving-machine, the combination,

with the frows N, of the rotary shaft L, the

arms T on the same between the'frows, the

cog-wheels K J, mounted on shafts L I, re-

sis 

